Die for forging reamer-blanks



1 (No Model.)

W. ROSS. DIE FOR FORGING REAMER BLANKS. No. 554,734. Patented Feb; 18,1896. 7? 4:9 1

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NITEVD STATES PATENT OFFICE.

IVILLIAM ROSS, OF MONTREAL, CANADA, ASSIGNOR TO THE VVROUGHT IRON BRIDGECOMPANY, OF CANTON, OHIO.

DIE FOR FORGING REAMER-BLANKS.

SPECIFICATION forming part of Letters Patent No. 554,734, dated February18, 1896. Application filed November 12,1894. Serial No. 528,494. (Nomodel.)

To all whom it may concern:

Be it known that I, WILLIAM Ross, a citizen of the Dominion of Canada,residing at Montreal, Province of Quebec, Canada, have invented certainnew and useful Improvements in Dies for Forging Reamer-Blanks; and I dohereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the annexed drawings,making a part of this specification, and to the letters of referencemarked thereon, in which- Figure 1 is a view showing the dies parted andshowing a bar of metal from which the reamer is to be forged placed inposition to be acted upon by the dies. Fig. 2 is a view showing the diesclosed or placed one upon the other. Fig. 3 is a View showing the barfrom which a reamer is to be forged and before any work has been doneupon the bar. Fig. 4 is a view showing a reamer-bar after it has beenforged to form the webs and before the bar has been twisted. Fig. 5 is aView showing a completed reamer. Fig. 6 is a transverse section throughline 5c 00, Fig. 4. Fig. 7 is a view showing the top or upper side ofthe lower die.

The present invention has relation to reamers; and it consists in thenovel formation and construction hereinafter described and claimed.

Similar letters of reference indicate correspondin g parts in all of thefigures of the drawings.

In the accompanying drawings, A represents the lower die and B the upperdie, and in use the upper die is given a reciprocating or strikingmovement, which machinery for giving this motion forms no particularpart of the present invention and is not illustrated. The lower die isfixed or seated in the ordinary manner, which die is held in a solidfoundation or bed. The dies A and B are each provided with thelongitudinal grooves a, which grooves are formed of a depth tocorrespond with the width of the web 19 to be formed upon the bar C, andfor the purpose of giving to the web the desired amount of taper fromthe heel of the reamer to its entering end the grooves a formed in thedies A and B are tapered, as illustrated in Fig. 7, said grooves beingso located that when the dies are placed in proper operative positionsthe grooves will be located substantially as shown in Fig. 1. I

For the purpose of providing proper spaces for the webs 17 between thedies after said webs have been started each of the dies are providedwith the recesses c, which recesses are formed upon opposite sides ofthe grooves a. In use or in the manufacture of reamers the bar fromwhich a reamer is to be forged is forined square andof the desiredlength, after which the bar, such as D, is brought to the proper forgingheat and is placed between the dies A and B, and the upper die given areciprocating motion, which motion forms the webs by means of therecesses c, and for the purpose of forming or forging webs from each ofthe corners the bar D is rotated, so that diametrically-opposite cornerswill be acted upon at each stroke of the upper die. The Webs not actedupon by the dies are received into the grooves a as the webs are formed.The bar D is rotated and acted upon by the dies until a bar, such as C,is produced, after which the bar C is twisted in any convenient andwell-known manner, thereby producing a finished reamer, such as E, afterwhich the reamer is placed in a lathe and properly turned to a givendiameter.

It will be understood that the depth of the recesses 0 should decreasefrom the heel end of the dies, thereby giving to the finished or forgedwebs the desired amount of taper.

In describing the manner of manufacturing reaming-tools I haveillustrated and described a rectangular bar; but it will be understoodthat this particular form of bar in cross-section is not absolutelynecessary, and I do not desire to be limited to any form of bar incross-section. Neither do I desire to be confined to the exact number ofwebs, as it will be understood that a greater or less number may beformed without departing from the nature of the present invention.

In testimony that l claim the above I have hereunto subscrlhed my namein the presence I o of two witnesses.

WILLIAM ROSS.-

lvitnesses ERNEST O. BRYANT, PHILIP LABELLE;

